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• subprocess ffmpeg multiple drawtext

  6 juillet 2012, par knishua

  stuck here, how is it possible to pass multiple parameters in ffmpeg via subprocess

  1. this command works in 'cmd'

     ffmpeg -threads 8 -i D :/imagesequence/background.jpg -vf "movie='D~:/imagesequence/thumbnail.jpg' [watermark] ; [in][watermark] overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/3[water] ;[water] drawtext=fontsize=32:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='shotName':x=(w)/2:y=(h)-50,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Notes ~:':x=(w)/5:y=(h)-90,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Frame Range ~:':x=(w)/5:y=(h)-130,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Lens ~:':x=(w)/5:y=(h)-170,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Undistortion ~:':x=(w)/5:y=(h)-210,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Image Sequence ~:':x=(w)/5:y=(h)-250,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Date ~:':x=(w)/5:y=(h)-290,drawtext=fontsize=28:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text='Element Name ~:':x=(w)/5:y=(h)-330,drawtext=fontfile=/Windows/Fonts/arial.ttf:text='FUTUREWORKS':x=130:y=200:fontsize=54:fontcolor=White[out]" D :\imagesequence\dpx\brn_055.0000.dpx

  2. when trying thru subprocess it fails. instead of trying the whole of it, tried

     thj = "D~:/imagesequence/thumbnail.jpg"
     paramd = "movie='%s'[watermark] ;[in][watermark]overlay=(main_w-overlay_w)/2 :(main_h-overlay_h)/3[water] ;[water]drawtext=fontsize=32:fontcolor=White:fontfile=/Windows/Fonts/arial.ttf:text=\'shotName\':x=(w)/2:y=(h)-50[out]" % thj
     subprocess.check_call(["ffmpeg", "-threads", "8", "-i", "D :/imagesequence/background.jpg", "-vf", paramd ,"D :/imagesequence/dpx/brn_055.0000.dpx"], shell=True)

  This is only putting 1 text instead of 5 text on the screen

  any different view on this. how to successfully run this command

• concat string within ffmpeg subprocess check_call

  6 juillet 2012, par knishua

  need to replace filename in subprocess command i.e. filename

  filename = '\'D\:/imagesequence/thumbnail.jpg\''
  
  
  
  
  
  task = '\"movie= ' + filename + '[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]\"'

  c = subprocess.check_call(["ffmpeg", "-i", "D :/imagesequence/background222.jpg", "-vf", task, "D :/imagesequence/fwtm108.jpg"],shell=True)

  this gives error

  # Error: CalledProcessError: Command '['ffmpeg', '-i', 'D:/imagesequence/background222.jpg', '-vf', '"movie= \'D\\:/imagesequence/thumbnail.jpg\'[watermark];[in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]"', 'D:/imagesequence/fwtm107.jpg']' returned non-zero exit status 1 # 

  when put altogether it works well

  c = subprocess.check_call(["ffmpeg", "-i", "D:/imagesequence/background222.jpg", "-vf", "movie= 'D\:/imagesequence/thumbnail.jpg'[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]", "D:/imagesequence/fwtm101.jpg"],shell=True)

  even this works

  task = "movie= 'D\:/imagesequence/thumbnail.jpg'[watermark]; [in][watermark] overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/3 [out]"
  
  
  
  c = subprocess.check_call(["ffmpeg", "-i", "D:/imagesequence/background222.jpg", "-vf", task, "D:/imagesequence/fwtm102.jpg"],shell=True)

  any different view. I am not able to see it.

• create image from video with ffmpeg

  1er juillet 2012, par Rajanikant Shukla

  I want to create image from video(.mpeg) file. i downloded ffmpeg and i put php_ffmpeg.dll to my /php/ext and rest of file in windows/system32 and i use following programm Please have look and told to create in step wise

  <?php
  
  
  
       function ExtractThumb($in, $out)
  
        {
  
             $thumb_stdout;
  
             $errors;
  
          $retval = 0;
  
  
  
  // Delete the file if it already exists
  
  if (file_exists($out)) { unlink($out); }
  
  
  
  // Use ffmpeg to generate a thumbnail from the movie
  
  $cmd = "ffmpeg -itsoffset -4 -i $in -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 $out 2>&1";
  
  exec($cmd, $thumb_stdout, $retval);
  
  
  
  // Queue up the error for processing
  
  if ($retval != 0) { $errors[] = "FFMPEG thumbnail generation failed"; }
  
  
  
  if (!empty($thumb_stdout))
  
  {
  
      foreach ($thumb_stdout as $line)
  
      {
  
          echo $line . "
  
        \n";
  
      }
  
  }
  
  
  
  if (!empty($errors))
  
  {
  
      foreach ($errors as $error)
  
      {
  
          echo $error . "
  
     \n";
  
      }
  
          }
  
            }
  
  
  
  
  
          $in="D:\Video\handycam\guria marriage\HANDYCAM VIDIEO\M2U00233.mpeg";
  
         $out="D:\Video\handycam\guria marriage\HANDYCAM VIDIEO";
  
  
  
               ExtractThumb($in, $out);
  
             ?>